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/cvs/Coro/Coro/State.xs

Comparing Coro/Coro/State.xs (file contents):
Revision 1.79 by root, Thu Nov 2 12:29:08 2006 UTC vs.
Revision 1.106 by root, Mon Nov 27 02:08:55 2006 UTC

1	#define PERL_NO_GET_CONTEXT
2
3	#include "libcoro/coro.c"	1	#include "libcoro/coro.c"
4		2
5	#include "EXTERN.h"	3	#include "EXTERN.h"
6	#include "perl.h"	4	#include "perl.h"
7	#include "XSUB.h"	5	#include "XSUB.h"
8		6
9	#include "patchlevel.h"	7	#include "patchlevel.h"
10		8
11	#if PERL_VERSION < 6	9	#if USE_VALGRIND
		10	# include <valgrind/valgrind.h>
		11	#endif
		12
		13	#define PERL_VERSION_ATLEAST(a,b,c) \
		14	(PERL_REVISION > (a) \
		15	|| (PERL_REVISION == (a) \
		16	&& (PERL_VERSION > (b) \
		17	|| (PERL_VERSION == (b) && PERLSUBVERSION >= (c)))))
		18
		19	#if !PERL_VERSION_ATLEAST (5,6,0)
12	# ifndef PL_ppaddr	20	# ifndef PL_ppaddr
13	# define PL_ppaddr ppaddr	21	# define PL_ppaddr ppaddr
14	# endif	22	# endif
15	# ifndef call_sv	23	# ifndef call_sv
16	# define call_sv perl_call_sv	24	# define call_sv perl_call_sv
…		…
27	# ifndef IS_PADCONST	35	# ifndef IS_PADCONST
28	# define IS_PADCONST(v) 0	36	# define IS_PADCONST(v) 0
29	# endif	37	# endif
30	#endif	38	#endif
31		39
		40	#include <stdio.h>
32	#include <errno.h>	41	#include <errno.h>
33		42
34	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64	43	#if !__i386 && !__x86_64 && !__powerpc && !__m68k && !__alpha && !__mips && !__sparc64
35	# undef STACKGUARD	44	# undef STACKGUARD
36	#endif	45	#endif
…		…
53	# ifndef PAGESIZE	62	# ifndef PAGESIZE
54	# define PAGESIZE pagesize	63	# define PAGESIZE pagesize
55	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)	64	# define BOOT_PAGESIZE pagesize = sysconf (_SC_PAGESIZE)
56	static long pagesize;	65	static long pagesize;
57	# else	66	# else
58	# define BOOT_PAGESIZE	67	# define BOOT_PAGESIZE (void)0
59	# endif	68	# endif
		69	#else
		70	# define PAGESIZE 0
		71	# define BOOT_PAGESIZE (void)0
60	#endif	72	#endif
61
62	#define SUB_INIT "Coro::State::initialize"
63	#define UCORO_STATE "_coro_state"
64		73
65	/* The next macro should declare a variable stacklevel that contains and approximation	74	/* The next macro should declare a variable stacklevel that contains and approximation
66	* to the current C stack pointer. Its property is that it changes with each call	75	* to the current C stack pointer. Its property is that it changes with each call
67	* and should be unique. */	76	* and should be unique. */
		77	#define dSTACKLEVEL int stacklevel
68	#define dSTACKLEVEL void *stacklevel = &stacklevel	78	#define STACKLEVEL ((void *)&stacklevel)
69		79
70	#define IN_DESTRUCT (PL_main_cv == Nullcv)	80	#define IN_DESTRUCT (PL_main_cv == Nullcv)
71		81
72	#define labs(l) ((l) >= 0 ? (l) : -(l))	82	#if __GNUC__ >= 3
		83	# define attribute(x) __attribute__(x)
		84	#else
		85	# define attribute(x)
		86	#endif
		87
		88	#define NOINLINE attribute ((noinline))
73		89
74	#include "CoroAPI.h"	90	#include "CoroAPI.h"
		91
		92	#define TRANSFER_SET_STACKLEVEL 0x8bfbfbfb /* magic cookie */
75		93
76	#ifdef USE_ITHREADS	94	#ifdef USE_ITHREADS
77	static perl_mutex coro_mutex;	95	static perl_mutex coro_mutex;
78	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)	96	# define LOCK do { MUTEX_LOCK (&coro_mutex); } while (0)
79	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)	97	# define UNLOCK do { MUTEX_UNLOCK (&coro_mutex); } while (0)
…		…
82	# define UNLOCK (void)0	100	# define UNLOCK (void)0
83	#endif	101	#endif
84		102
85	static struct CoroAPI coroapi;	103	static struct CoroAPI coroapi;
86	static AV *main_mainstack; /* used to differentiate between $main and others */	104	static AV *main_mainstack; /* used to differentiate between $main and others */
87	static HV *coro_state_stash;	105	static HV *coro_state_stash, *coro_stash;
88	static SV *ucoro_state_sv;
89	static U32 ucoro_state_hash;
90	static SV *coro_mortal; /* will be freed after next transfer */	106	static SV *coro_mortal; /* will be freed after next transfer */
91		107
92	/* this is actually not only the c stack but also c registers etc... */	108	/* this is a structure representing a c-level coroutine */
93	typedef struct {	109	typedef struct coro_cctx {
94	int refcnt; /* pointer reference counter */	110	struct coro_cctx *next;
95	int usecnt; /* shared by how many coroutines */
96	int gencnt; /* generation counter */
97		111
98	coro_context cctx;	112	/* the stack */
99
100	void *sptr;	113	void *sptr;
101	long ssize; /* positive == mmap, otherwise malloc */	114	long ssize; /* positive == mmap, otherwise malloc */
102	} coro_stack;
103		115
		116	/* cpu state */
		117	void *idle_sp; /* sp of top-level transfer/schedule/cede call */
		118	JMPENV *top_env;
		119	coro_context cctx;
		120
		121	#if USE_VALGRIND
		122	int valgrind_id;
		123	#endif
		124	} coro_cctx;
		125
		126	/* this is a structure representing a perl-level coroutine */
104	struct coro {	127	struct coro {
105	/* the top-level JMPENV for each coroutine, needed to catch dies. */	128	/* the c coroutine allocated to this perl coroutine, if any */
106	JMPENV start_env;	129	coro_cctx *cctx;
107		130
108	/* the optional C context */	131	/* data associated with this coroutine (initial args) */
109	coro_stack *stack;	132	AV *args;
110	void *cursp;
111	int gencnt;	133	int refcnt;
112		134
113	/* optionally saved, might be zero */	135	/* optionally saved, might be zero */
114	AV *defav;	136	AV *defav;
115	SV *defsv;	137	SV *defsv;
116	SV *errsv;	138	SV *errsv;
…		…
146	OP **retstack;	168	OP **retstack;
147	I32 retstack_ix;	169	I32 retstack_ix;
148	I32 retstack_max;	170	I32 retstack_max;
149	PMOP *curpm;	171	PMOP *curpm;
150	COP *curcop;	172	COP *curcop;
151	JMPENV *top_env;
152		173
153	/* data associated with this coroutine (initial args) */	174	/* coro process data */
154	AV *args;	175	int prio;
155	};	176	};
156		177
157	typedef struct coro *Coro__State;	178	typedef struct coro *Coro__State;
158	typedef struct coro *Coro__State_or_hashref;	179	typedef struct coro *Coro__State_or_hashref;
159		180
160	static AV *	181	static AV *
161	coro_clone_padlist (pTHX_ CV *cv)	182	coro_clone_padlist (CV *cv)
162	{	183	{
163	AV *padlist = CvPADLIST (cv);	184	AV *padlist = CvPADLIST (cv);
164	AV *newpadlist, *newpad;	185	AV *newpadlist, *newpad;
165		186
166	newpadlist = newAV ();	187	newpadlist = newAV ();
167	AvREAL_off (newpadlist);	188	AvREAL_off (newpadlist);
168	#if PERL_VERSION < 9	189	#if PERL_VERSION_ATLEAST (5,9,0)
		190	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
		191	#else
169	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);	192	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1, 1);
170	#else
171	Perl_pad_push (aTHX_ padlist, AvFILLp (padlist) + 1);
172	#endif	193	#endif
173	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];	194	newpad = (AV *)AvARRAY (padlist)[AvFILLp (padlist)];
174	--AvFILLp (padlist);	195	--AvFILLp (padlist);
175		196
176	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));	197	av_store (newpadlist, 0, SvREFCNT_inc (*av_fetch (padlist, 0, FALSE)));
…		…
178		199
179	return newpadlist;	200	return newpadlist;
180	}	201	}
181		202
182	static void	203	static void
183	free_padlist (pTHX_ AV *padlist)	204	free_padlist (AV *padlist)
184	{	205	{
185	/* may be during global destruction */	206	/* may be during global destruction */
186	if (SvREFCNT (padlist))	207	if (SvREFCNT (padlist))
187	{	208	{
188	I32 i = AvFILLp (padlist);	209	I32 i = AvFILLp (padlist);
…		…
209	AV *padlist;	230	AV *padlist;
210	AV *av = (AV *)mg->mg_obj;	231	AV *av = (AV *)mg->mg_obj;
211		232
212	/* casting is fun. */	233	/* casting is fun. */
213	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))	234	while (&PL_sv_undef != (SV *)(padlist = (AV *)av_pop (av)))
214	free_padlist (aTHX_ padlist);	235	free_padlist (padlist);
215		236
216	SvREFCNT_dec (av);	237	SvREFCNT_dec (av);
217		238
218	return 0;	239	return 0;
219	}	240	}
…		…
222		243
223	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};	244	static MGVTBL vtbl_coro = {0, 0, 0, 0, coro_cv_free};
224		245
225	/* the next two functions merely cache the padlists */	246	/* the next two functions merely cache the padlists */
226	static void	247	static void
227	get_padlist (pTHX_ CV *cv)	248	get_padlist (CV *cv)
228	{	249	{
229	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
230		251
231	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)	252	if (mg && AvFILLp ((AV *)mg->mg_obj) >= 0)
232	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);	253	CvPADLIST (cv) = (AV *)av_pop ((AV *)mg->mg_obj);
233	else	254	else
234	{	255	{
235	#if 0	256	#if 0
236	/* this should work - but it doesn't :( */	257	/* this is probably cleaner, but also slower? */
237	CV *cp = Perl_cv_clone (aTHX_ cv);	258	CV *cp = Perl_cv_clone (cv);
238	CvPADLIST (cv) = CvPADLIST (cp);	259	CvPADLIST (cv) = CvPADLIST (cp);
239	CvPADLIST (cp) = 0;	260	CvPADLIST (cp) = 0;
240	SvREFCNT_dec (cp);	261	SvREFCNT_dec (cp);
241	#else	262	#else
242	CvPADLIST (cv) = coro_clone_padlist (aTHX_ cv);	263	CvPADLIST (cv) = coro_clone_padlist (cv);
243	#endif	264	#endif
244	}	265	}
245	}	266	}
246		267
247	static void	268	static void
248	put_padlist (pTHX_ CV *cv)	269	put_padlist (CV *cv)
249	{	270	{
250	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);	271	MAGIC *mg = mg_find ((SV *)cv, PERL_MAGIC_coro);
251		272
252	if (!mg)	273	if (!mg)
253	{	274	{
…		…
261	}	282	}
262		283
263	#define SB do {	284	#define SB do {
264	#define SE } while (0)	285	#define SE } while (0)
265		286
266	#define LOAD(state) load_state(aTHX_ (state));	287	#define LOAD(state) load_state((state));
267	#define SAVE(state,flags) save_state(aTHX_ (state),(flags));	288	#define SAVE(state,flags) save_state((state),(flags));
268		289
269	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE	290	#define REPLACE_SV(sv,val) SB SvREFCNT_dec(sv); (sv) = (val); (val) = 0; SE
270		291
271	static void	292	static void
272	load_state(pTHX_ Coro__State c)	293	load_state(Coro__State c)
273	{	294	{
274	PL_dowarn = c->dowarn;	295	PL_dowarn = c->dowarn;
275	PL_in_eval = c->in_eval;	296	PL_in_eval = c->in_eval;
276		297
277	PL_curstackinfo = c->curstackinfo;	298	PL_curstackinfo = c->curstackinfo;
…		…
295	PL_scopestack_ix = c->scopestack_ix;	316	PL_scopestack_ix = c->scopestack_ix;
296	PL_scopestack_max = c->scopestack_max;	317	PL_scopestack_max = c->scopestack_max;
297	PL_savestack = c->savestack;	318	PL_savestack = c->savestack;
298	PL_savestack_ix = c->savestack_ix;	319	PL_savestack_ix = c->savestack_ix;
299	PL_savestack_max = c->savestack_max;	320	PL_savestack_max = c->savestack_max;
300	#if PERL_VERSION < 9	321	#if !PERL_VERSION_ATLEAST (5,9,0)
301	PL_retstack = c->retstack;	322	PL_retstack = c->retstack;
302	PL_retstack_ix = c->retstack_ix;	323	PL_retstack_ix = c->retstack_ix;
303	PL_retstack_max = c->retstack_max;	324	PL_retstack_max = c->retstack_max;
304	#endif	325	#endif
305	PL_curpm = c->curpm;	326	PL_curpm = c->curpm;
306	PL_curcop = c->curcop;	327	PL_curcop = c->curcop;
307	PL_top_env = c->top_env;
308		328
309	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);	329	if (c->defav) REPLACE_SV (GvAV (PL_defgv), c->defav);
310	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);	330	if (c->defsv) REPLACE_SV (DEFSV , c->defsv);
311	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);	331	if (c->errsv) REPLACE_SV (ERRSV , c->errsv);
312		332
…		…
319	{	339	{
320	AV *padlist = (AV *)POPs;	340	AV *padlist = (AV *)POPs;
321		341
322	if (padlist)	342	if (padlist)
323	{	343	{
324	put_padlist (aTHX_ cv); /* mark this padlist as available */	344	put_padlist (cv); /* mark this padlist as available */
325	CvPADLIST(cv) = padlist;	345	CvPADLIST(cv) = padlist;
326	}	346	}
327		347
328	++CvDEPTH(cv);	348	++CvDEPTH(cv);
329	}	349	}
…		…
331	PUTBACK;	351	PUTBACK;
332	}	352	}
333	}	353	}
334		354
335	static void	355	static void
336	save_state(pTHX_ Coro__State c, int flags)	356	save_state(Coro__State c, int flags)
337	{	357	{
338	{	358	{
339	dSP;	359	dSP;
340	I32 cxix = cxstack_ix;	360	I32 cxix = cxstack_ix;
341	PERL_CONTEXT *ccstk = cxstack;	361	PERL_CONTEXT *ccstk = cxstack;
…		…
369	}	389	}
370		390
371	PUSHs ((SV *)CvPADLIST(cv));	391	PUSHs ((SV *)CvPADLIST(cv));
372	PUSHs ((SV *)cv);	392	PUSHs ((SV *)cv);
373		393
374	get_padlist (aTHX_ cv);	394	get_padlist (cv);
375	}	395	}
376	}	396	}
377	#ifdef CXt_FORMAT	397	#ifdef CXt_FORMAT
378	else if (CxTYPE(cx) == CXt_FORMAT)	398	else if (CxTYPE(cx) == CXt_FORMAT)
379	{	399	{
…		…
423	c->scopestack_ix = PL_scopestack_ix;	443	c->scopestack_ix = PL_scopestack_ix;
424	c->scopestack_max = PL_scopestack_max;	444	c->scopestack_max = PL_scopestack_max;
425	c->savestack = PL_savestack;	445	c->savestack = PL_savestack;
426	c->savestack_ix = PL_savestack_ix;	446	c->savestack_ix = PL_savestack_ix;
427	c->savestack_max = PL_savestack_max;	447	c->savestack_max = PL_savestack_max;
428	#if PERL_VERSION < 9	448	#if !PERL_VERSION_ATLEAST (5,9,0)
429	c->retstack = PL_retstack;	449	c->retstack = PL_retstack;
430	c->retstack_ix = PL_retstack_ix;	450	c->retstack_ix = PL_retstack_ix;
431	c->retstack_max = PL_retstack_max;	451	c->retstack_max = PL_retstack_max;
432	#endif	452	#endif
433	c->curpm = PL_curpm;	453	c->curpm = PL_curpm;
434	c->curcop = PL_curcop;	454	c->curcop = PL_curcop;
435	c->top_env = PL_top_env;
436	}	455	}
437		456
438	/*	457	/*
439	* allocate various perl stacks. This is an exact copy	458	* allocate various perl stacks. This is an exact copy
440	* of perl.c:init_stacks, except that it uses less memory	459	* of perl.c:init_stacks, except that it uses less memory
441	* on the (sometimes correct) assumption that coroutines do	460	* on the (sometimes correct) assumption that coroutines do
442	* not usually need a lot of stackspace.	461	* not usually need a lot of stackspace.
443	*/	462	*/
444	static void	463	static void
445	coro_init_stacks (pTHX)	464	coro_init_stacks ()
446	{	465	{
447	LOCK;
448
449	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);	466	PL_curstackinfo = new_stackinfo(96, 1024/sizeof(PERL_CONTEXT) - 1);
450	PL_curstackinfo->si_type = PERLSI_MAIN;	467	PL_curstackinfo->si_type = PERLSI_MAIN;
451	PL_curstack = PL_curstackinfo->si_stack;	468	PL_curstack = PL_curstackinfo->si_stack;
452	PL_mainstack = PL_curstack; /* remember in case we switch stacks */	469	PL_mainstack = PL_curstack; /* remember in case we switch stacks */
453		470
…		…
474		491
475	New(54,PL_savestack,96,ANY);	492	New(54,PL_savestack,96,ANY);
476	PL_savestack_ix = 0;	493	PL_savestack_ix = 0;
477	PL_savestack_max = 96;	494	PL_savestack_max = 96;
478		495
479	#if PERL_VERSION < 9	496	#if !PERL_VERSION_ATLEAST (5,9,0)
480	New(54,PL_retstack,8,OP*);	497	New(54,PL_retstack,8,OP*);
481	PL_retstack_ix = 0;	498	PL_retstack_ix = 0;
482	PL_retstack_max = 8;	499	PL_retstack_max = 8;
483	#endif	500	#endif
484
485	UNLOCK;
486	}	501	}
487		502
488	/*	503	/*
489	* destroy the stacks, the callchain etc...	504	* destroy the stacks, the callchain etc...
490	*/	505	*/
491	static void	506	static void
492	destroy_stacks(pTHX)	507	coro_destroy_stacks ()
493	{	508	{
494	if (!IN_DESTRUCT)	509	if (!IN_DESTRUCT)
495	{	510	{
496	/* is this ugly, I ask? */	511	/* is this ugly, I ask? */
497	LEAVE_SCOPE (0);	512	LEAVE_SCOPE (0);
…		…
528		543
529	Safefree (PL_tmps_stack);	544	Safefree (PL_tmps_stack);
530	Safefree (PL_markstack);	545	Safefree (PL_markstack);
531	Safefree (PL_scopestack);	546	Safefree (PL_scopestack);
532	Safefree (PL_savestack);	547	Safefree (PL_savestack);
533	#if PERL_VERSION < 9	548	#if !PERL_VERSION_ATLEAST (5,9,0)
534	Safefree (PL_retstack);	549	Safefree (PL_retstack);
535	#endif	550	#endif
536	}	551	}
537		552
538	static void	553	static void
539	allocate_stack (Coro__State ctx, int alloc)	554	setup_coro (struct coro *coro)
540	{
541	coro_stack *stack;
542
543	New (0, stack, 1, coro_stack);
544
545	stack->refcnt = 1;
546	stack->usecnt = 1;
547	stack->gencnt = ctx->gencnt = 0;
548
549	if (alloc)
550	{
551	#if HAVE_MMAP
552	stack->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE; /* mmap should do allocate-on-write for us */
553	stack->sptr = mmap (0, stack->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
554	if (stack->sptr != (void *)-1)
555	{
556	# if STACKGUARD
557	mprotect (stack->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
558	# endif
559	}
560	else
561	#endif
562	{
563	stack->ssize = - (STACKSIZE * (long)sizeof (long));
564	New (0, stack->sptr, STACKSIZE, long);
565	}
566	}
567	else
568	stack->sptr = 0;
569
570	ctx->stack = stack;
571	}
572
573	static void
574	deallocate_stack (Coro__State ctx)
575	{
576	coro_stack *stack = ctx->stack;
577
578	ctx->stack = 0;
579
580	if (stack)
581	{
582	if (!--stack->refcnt)
583	{
584	#ifdef HAVE_MMAP
585	if (stack->ssize > 0 && stack->sptr)
586	munmap (stack->sptr, stack->ssize);
587	else
588	#endif
589	Safefree (stack->sptr);
590
591	Safefree (stack);
592	}
593	else if (ctx->gencnt == stack->gencnt)
594	--stack->usecnt;
595	}
596	}
597
598	static void
599	setup_coro (void *arg)
600	{	555	{
601	/*	556	/*
602	* emulate part of the perl startup here.	557	* emulate part of the perl startup here.
603	*/	558	*/
604	dTHX;
605	dSP;
606	Coro__State ctx = (Coro__State)arg;
607	SV *sub_init = (SV *)get_cv (SUB_INIT, FALSE);
608		559
609	coro_init_stacks (aTHX);	560	coro_init_stacks ();
		561
610	/*PL_curcop = 0;*/	562	PL_curcop = 0;
611	/*PL_in_eval = PL_in_eval;*/ /* inherit */	563	PL_in_eval = 0;
		564	PL_curpm = 0;
		565
		566	{
		567	dSP;
		568	LOGOP myop;
		569
		570	/* I have no idea why this is needed, but it is */
		571	PUSHMARK (SP);
		572
612	SvREFCNT_dec (GvAV (PL_defgv));	573	SvREFCNT_dec (GvAV (PL_defgv));
613	GvAV (PL_defgv) = ctx->args; ctx->args = 0;	574	GvAV (PL_defgv) = coro->args; coro->args = 0;
614		575
615	SPAGAIN;
616
617	if (ctx->stack)
618	{
619	ctx->cursp = 0;
620
621	PUSHMARK(SP);
622	PUTBACK;
623	(void) call_sv (sub_init, G_VOID|G_NOARGS|G_EVAL);
624
625	if (SvTRUE (ERRSV))
626	croak (NULL);
627	else
628	croak ("FATAL: CCTXT coroutine returned!");
629	}
630	else
631	{
632	UNOP myop;
633
634	PL_op = (OP *)&myop;
635
636	Zero(&myop, 1, UNOP);	576	Zero (&myop, 1, LOGOP);
637	myop.op_next = Nullop;	577	myop.op_next = Nullop;
638	myop.op_flags = OPf_WANT_VOID;	578	myop.op_flags = OPf_WANT_VOID;
639		579
		580	PL_op = (OP *)&myop;
		581
640	PUSHMARK(SP);	582	PUSHMARK (SP);
641	XPUSHs (sub_init);	583	XPUSHs ((SV *)get_cv ("Coro::State::coro_init", FALSE));
642	/*
643	* the next line is slightly wrong, as PL_op->op_next
644	* is actually being executed so we skip the first op.
645	* that doesn't matter, though, since it is only
646	* pp_nextstate and we never return...
647	* ah yes, and I don't care anyways ;)
648	*/
649	PUTBACK;	584	PUTBACK;
650	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);	585	PL_op = PL_ppaddr[OP_ENTERSUB](aTHX);
651	SPAGAIN;	586	SPAGAIN;
652		587
653	ENTER; /* necessary e.g. for dounwind */	588	ENTER; /* necessary e.g. for dounwind */
654	}	589	}
655	}	590	}
656		591
657	static void	592	static void
658	continue_coro (void *arg)	593	free_coro_mortal ()
659	{	594	{
660	/*
661	* this is a _very_ stripped down perl interpreter ;)
662	*/
663	dTHX;
664	Coro__State ctx = (Coro__State)arg;
665
666	PL_top_env = &ctx->start_env;
667
668	ctx->cursp = 0;
669	PL_op = PL_op->op_next;
670	CALLRUNOPS(aTHX);
671
672	abort ();
673	}
674
675	static void
676	transfer (pTHX_ struct coro *prev, struct coro *next, int flags)
677	{
678	dSTACKLEVEL;
679
680	if (prev != next)
681	{
682	if (next->mainstack)
683	{
684	LOCK;
685	SAVE (prev, flags);
686	LOAD (next);
687	UNLOCK;
688
689	/* mark this state as in-use */
690	next->mainstack = 0;
691	next->tmps_ix = -2;
692
693	/* stacklevel changed? if yes, grab the stack for us! */
694	if (flags & TRANSFER_SAVE_CCTXT)
695	{
696	if (!prev->stack)
697	allocate_stack (prev, 0);
698	else if (prev->cursp != stacklevel
699	&& prev->stack->usecnt > 1)
700	{
701	prev->gencnt = ++prev->stack->gencnt;
702	prev->stack->usecnt = 1;
703	}
704
705	/* has our stack been invalidated? */
706	if (next->stack && next->stack->gencnt != next->gencnt)
707	{
708	deallocate_stack (next);
709	allocate_stack (next, 1);
710	coro_create (&(next->stack->cctx),
711	continue_coro, (void *)next,
712	next->stack->sptr, labs (next->stack->ssize));
713	}
714
715	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
716	prev->cursp = stacklevel;
717	/* don't add any code here */
718	}
719	else
720	next->cursp = stacklevel;
721	}
722	else if (next->tmps_ix == -2)
723	croak ("tried to transfer to running coroutine");
724	else
725	{
726	LOCK;
727	SAVE (prev, -1); /* first get rid of the old state */
728	UNLOCK;
729
730	if (flags & TRANSFER_SAVE_CCTXT)
731	{
732	if (!prev->stack)
733	allocate_stack (prev, 0);
734
735	if (prev->stack->sptr && flags & TRANSFER_LAZY_STACK)
736	{
737	PL_top_env = &next->start_env;
738
739	setup_coro (next);
740	next->cursp = stacklevel;
741
742	prev->stack->refcnt++;
743	prev->stack->usecnt++;
744	next->stack = prev->stack;
745	next->gencnt = prev->gencnt;
746	}
747	else
748	{
749	assert (!next->stack);
750	allocate_stack (next, 1);
751	coro_create (&(next->stack->cctx),
752	setup_coro, (void *)next,
753	next->stack->sptr, labs (next->stack->ssize));
754	coro_transfer (&(prev->stack->cctx), &(next->stack->cctx));
755	prev->cursp = stacklevel;
756	/* don't add any code here */
757	}
758	}
759	else
760	{
761	setup_coro (next);
762	next->cursp = stacklevel;
763	}
764	}
765	}
766
767	LOCK;
768	if (coro_mortal)	595	if (coro_mortal)
769	{	596	{
770	SvREFCNT_dec (coro_mortal);	597	SvREFCNT_dec (coro_mortal);
771	coro_mortal = 0;	598	coro_mortal = 0;
772	}	599	}
		600	}
		601
		602	static void NOINLINE
		603	prepare_cctx (coro_cctx *cctx)
		604	{
		605	dSP;
		606	LOGOP myop;
		607
		608	Zero (&myop, 1, LOGOP);
		609	myop.op_next = PL_op;
		610	myop.op_flags = OPf_WANT_VOID;
		611
		612	sv_setiv (get_sv ("Coro::State::cctx", FALSE), PTR2IV (cctx));
		613
		614	PUSHMARK (SP);
		615	XPUSHs ((SV *)get_cv ("Coro::State::cctx_init", FALSE));
		616	PUTBACK;
		617	PL_restartop = PL_ppaddr[OP_ENTERSUB](aTHX);
		618	SPAGAIN;
		619	}
		620
		621	static void
		622	coro_run (void *arg)
		623	{
		624	/* coro_run is the alternative epilogue of transfer() */
773	UNLOCK;	625	UNLOCK;
774	}
775		626
776	#define SV_CORO(sv,func) \	627	/*
777	do { \	628	* this is a _very_ stripped down perl interpreter ;)
778	if (SvROK (sv)) \	629	*/
779	sv = SvRV (sv); \	630	PL_top_env = &PL_start_env;
780	\	631	/* inject call to cctx_init */
781	if (SvTYPE (sv) == SVt_PVHV) \	632	prepare_cctx ((coro_cctx *)arg);
782	{ \
783	HE *he = hv_fetch_ent ((HV *)sv, ucoro_state_sv, 0, ucoro_state_hash); \
784	\
785	if (!he) \
786	croak ("%s() -- %s is a hashref but lacks the " UCORO_STATE " key", func, # sv); \
787	\
788	(sv) = SvRV (HeVAL(he)); \
789	} \
790	\
791	/* must also be changed inside Coro::Cont::yield */ \
792	if (!SvOBJECT (sv) || SvSTASH (sv) != coro_state_stash) \
793	croak ("%s() -- %s is not (and contains not) a Coro::State object", func, # sv); \
794	\
795	} while(0)
796		633
797	#define SvSTATE(sv) INT2PTR (struct coro *, SvIV (sv))	634	/* somebody will hit me for both perl_run and PL_restartop */
		635	perl_run (PL_curinterp);
798		636
		637	fputs ("FATAL: C coroutine fell over the edge of the world, aborting. Did you call exit in a coroutine?\n", stderr);
		638	abort ();
		639	}
		640
		641	static coro_cctx *
		642	cctx_new ()
		643	{
		644	coro_cctx *cctx;
		645
		646	New (0, cctx, 1, coro_cctx);
		647
		648	#if HAVE_MMAP
		649
		650	cctx->ssize = ((STACKSIZE * sizeof (long) + PAGESIZE - 1) / PAGESIZE + STACKGUARD) * PAGESIZE;
		651	/* mmap suppsedly does allocate-on-write for us */
		652	cctx->sptr = mmap (0, cctx->ssize, PROT_EXEC|PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
		653
		654	if (cctx->sptr == (void *)-1)
		655	{
		656	perror ("FATAL: unable to mmap stack for coroutine");
		657	_exit (EXIT_FAILURE);
		658	}
		659
		660	# if STACKGUARD
		661	mprotect (cctx->sptr, STACKGUARD * PAGESIZE, PROT_NONE);
		662	# endif
		663
		664	#else
		665
		666	cctx->ssize = STACKSIZE * (long)sizeof (long);
		667	New (0, cctx->sptr, STACKSIZE, long);
		668
		669	if (!cctx->sptr)
		670	{
		671	perror ("FATAL: unable to malloc stack for coroutine");
		672	_exit (EXIT_FAILURE);
		673	}
		674
		675	#endif
		676
		677	#if USE_VALGRIND
		678	cctx->valgrind_id = VALGRIND_STACK_REGISTER (
		679	STACKGUARD * PAGESIZE + (char *)cctx->sptr,
		680	cctx->ssize + (char *)cctx->sptr
		681	);
		682	#endif
		683
		684	coro_create (&cctx->cctx, coro_run, (void *)cctx, cctx->sptr, cctx->ssize);
		685
		686	return cctx;
		687	}
		688
		689	static void
		690	cctx_free (coro_cctx *cctx)
		691	{
		692	if (!cctx)
		693	return;
		694
		695	#if USE_VALGRIND
		696	VALGRIND_STACK_DEREGISTER (cctx->valgrind_id);
		697	#endif
		698
		699	#if HAVE_MMAP
		700	munmap (cctx->sptr, cctx->ssize);
		701	#else
		702	Safefree (cctx->sptr);
		703	#endif
		704
		705	Safefree (cctx);
		706	}
		707
		708	static coro_cctx *cctx_first;
		709	static int cctx_count, cctx_idle;
		710
		711	static coro_cctx *
		712	cctx_get ()
		713	{
		714	coro_cctx *cctx;
		715
		716	if (cctx_first)
		717	{
		718	--cctx_idle;
		719	cctx = cctx_first;
		720	cctx_first = cctx->next;
		721	}
		722	else
		723	{
		724	++cctx_count;
		725	cctx = cctx_new ();
		726	PL_op = PL_op->op_next;
		727	}
		728
		729	return cctx;
		730	}
		731
		732	static void
		733	cctx_put (coro_cctx *cctx)
		734	{
		735	++cctx_idle;
		736	cctx->next = cctx_first;
		737	cctx_first = cctx;
		738	}
		739
		740	/* never call directly, always through the coro_state_transfer global variable */
		741	static void NOINLINE
		742	transfer (struct coro *prev, struct coro *next, int flags)
		743	{
		744	dSTACKLEVEL;
		745
		746	/* sometimes transfer is only called to set idle_sp */
		747	if (flags == TRANSFER_SET_STACKLEVEL)
		748	((coro_cctx *)prev)->idle_sp = STACKLEVEL;
		749	else if (prev != next)
		750	{
		751	coro_cctx *prev__cctx;
		752
		753	LOCK;
		754
		755	if (next->mainstack)
		756	{
		757	/* coroutine already started */
		758	SAVE (prev, flags);
		759	LOAD (next);
		760	}
		761	else
		762	{
		763	/* need to start coroutine */
		764	/* first get rid of the old state */
		765	SAVE (prev, -1);
		766	/* setup coroutine call */
		767	setup_coro (next);
		768	/* need a stack */
		769	next->cctx = 0;
		770	}
		771
		772	if (!prev->cctx)
		773	/* create a new empty context */
		774	Newz (0, prev->cctx, 1, coro_cctx);
		775
		776	prev__cctx = prev->cctx;
		777
		778	/* possibly "free" the cctx */
		779	if (prev__cctx->idle_sp == STACKLEVEL)
		780	{
		781	cctx_put (prev__cctx);
		782	prev->cctx = 0;
		783	}
		784
		785	if (!next->cctx)
		786	next->cctx = cctx_get ();
		787
		788	if (prev__cctx != next->cctx)
		789	{
		790	prev__cctx->top_env = PL_top_env;
		791	PL_top_env = next->cctx->top_env;
		792	coro_transfer (&prev__cctx->cctx, &next->cctx->cctx);
		793	}
		794
		795	free_coro_mortal ();
		796
		797	UNLOCK;
		798	}
		799	}
		800
		801	struct transfer_args
		802	{
		803	struct coro *prev, *next;
		804	int flags;
		805	};
		806
		807	#define TRANSFER(ta) transfer ((ta).prev, (ta).next, (ta).flags)
		808
		809	static void
		810	coro_state_destroy (struct coro *coro)
		811	{
		812	if (coro->refcnt--)
		813	return;
		814
		815	if (coro->mainstack && coro->mainstack != main_mainstack)
		816	{
		817	struct coro temp;
		818
		819	SAVE ((&temp), TRANSFER_SAVE_ALL);
		820	LOAD (coro);
		821
		822	coro_destroy_stacks ();
		823
		824	LOAD ((&temp)); /* this will get rid of defsv etc.. */
		825
		826	coro->mainstack = 0;
		827	}
		828
		829	cctx_free (coro->cctx);
		830	SvREFCNT_dec (coro->args);
		831	Safefree (coro);
		832	}
		833
799	static void	834	static int
		835	coro_state_clear (pTHX_ SV *sv, MAGIC *mg)
		836	{
		837	struct coro *coro = (struct coro *)mg->mg_ptr;
		838	mg->mg_ptr = 0;
		839
		840	coro_state_destroy (coro);
		841
		842	return 0;
		843	}
		844
		845	static int
		846	coro_state_dup (pTHX_ MAGIC *mg, CLONE_PARAMS *params)
		847	{
		848	struct coro *coro = (struct coro *)mg->mg_ptr;
		849
		850	++coro->refcnt;
		851
		852	return 0;
		853	}
		854
		855	static MGVTBL coro_state_vtbl = {
		856	0, 0, 0, 0,
		857	coro_state_clear,
		858	0,
		859	#ifdef MGf_DUP
		860	coro_state_dup,
		861	#else
		862	# define MGf_DUP 0
		863	#endif
		864	};
		865
		866	static struct coro *
		867	SvSTATE (SV *coro)
		868	{
		869	HV *stash;
		870	MAGIC *mg;
		871
		872	if (SvROK (coro))
		873	coro = SvRV (coro);
		874
		875	stash = SvSTASH (coro);
		876	if (stash != coro_stash && stash != coro_state_stash)
		877	{
		878	/* very slow, but rare, check */
		879	if (!sv_derived_from (sv_2mortal (newRV_inc (coro)), "Coro::State"))
		880	croak ("Coro::State object required");
		881	}
		882
		883	mg = SvMAGIC (coro);
		884	assert (mg->mg_type == PERL_MAGIC_ext);
		885	return (struct coro *)mg->mg_ptr;
		886	}
		887
		888	static void
		889	prepare_transfer (struct transfer_args *ta, SV *prev, SV *next, int flags)
		890	{
		891	ta->prev = SvSTATE (prev);
		892	ta->next = SvSTATE (next);
		893	ta->flags = flags;
		894	}
		895
		896	static void
800	api_transfer(pTHX_ SV *prev, SV *next, int flags)	897	api_transfer (SV *prev, SV *next, int flags)
801	{	898	{
802	SV_CORO (prev, "Coro::transfer");	899	dTHX;
803	SV_CORO (next, "Coro::transfer");	900	struct transfer_args ta;
804		901
805	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	902	prepare_transfer (&ta, prev, next, flags);
		903	TRANSFER (ta);
806	}	904	}
807		905
808	/** Coro ********************************************************************/	906	/** Coro ********************************************************************/
809		907
810	#define PRIO_MAX 3	908	#define PRIO_MAX 3
…		…
814	#define PRIO_IDLE -3	912	#define PRIO_IDLE -3
815	#define PRIO_MIN -4	913	#define PRIO_MIN -4
816		914
817	/* for Coro.pm */	915	/* for Coro.pm */
818	static GV *coro_current, *coro_idle;	916	static GV *coro_current, *coro_idle;
819	static AV *coro_ready[PRIO_MAX-PRIO_MIN+1];	917	static AV *coro_ready [PRIO_MAX-PRIO_MIN+1];
820	static int coro_nready;	918	static int coro_nready;
821		919
822	static void	920	static void
823	coro_enq (pTHX_ SV *sv)	921	coro_enq (SV *sv)
824	{	922	{
825	SV **xprio;
826	int prio;	923	int prio;
827		924
828	if (SvTYPE (sv) != SVt_PVHV)	925	if (SvTYPE (sv) != SVt_PVHV)
829	croak ("Coro::ready tried to enqueue something that is not a coroutine");	926	croak ("Coro::ready tried to enqueue something that is not a coroutine");
830		927
831	xprio = hv_fetch ((HV *)sv, "prio", 4, 0);	928	prio = SvSTATE (sv)->prio;
832	prio = xprio ? SvIV (*xprio) : PRIO_NORMAL;
833
834	prio = prio > PRIO_MAX ? PRIO_MAX
835	: prio < PRIO_MIN ? PRIO_MIN
836	: prio;
837		929
838	av_push (coro_ready [prio - PRIO_MIN], sv);	930	av_push (coro_ready [prio - PRIO_MIN], sv);
839	coro_nready++;	931	coro_nready++;
840	}	932	}
841		933
842	static SV *	934	static SV *
843	coro_deq (pTHX_ int min_prio)	935	coro_deq (int min_prio)
844	{	936	{
845	int prio = PRIO_MAX - PRIO_MIN;	937	int prio = PRIO_MAX - PRIO_MIN;
846		938
847	min_prio -= PRIO_MIN;	939	min_prio -= PRIO_MIN;
848	if (min_prio < 0)	940	if (min_prio < 0)
849	min_prio = 0;	941	min_prio = 0;
850		942
851	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )	943	for (prio = PRIO_MAX - PRIO_MIN + 1; --prio >= min_prio; )
852	if (av_len (coro_ready[prio]) >= 0)	944	if (AvFILLp (coro_ready [prio]) >= 0)
853	{	945	{
854	coro_nready--;	946	coro_nready--;
855	return av_shift (coro_ready[prio]);	947	return av_shift (coro_ready [prio]);
856	}	948	}
857		949
858	return 0;	950	return 0;
859	}	951	}
860		952
…		…
865		957
866	if (SvROK (coro))	958	if (SvROK (coro))
867	coro = SvRV (coro);	959	coro = SvRV (coro);
868		960
869	LOCK;	961	LOCK;
870	coro_enq (aTHX_ SvREFCNT_inc (coro));	962	coro_enq (SvREFCNT_inc (coro));
871	UNLOCK;	963	UNLOCK;
872	}	964	}
873		965
874	static void	966	static void
		967	prepare_schedule (struct transfer_args *ta)
		968	{
		969	SV *current, *prev, *next;
		970
		971	current = GvSV (coro_current);
		972
		973	for (;;)
		974	{
		975	LOCK;
		976	next = coro_deq (PRIO_MIN);
		977	UNLOCK;
		978
		979	if (next)
		980	break;
		981
		982	{
		983	dSP;
		984
		985	ENTER;
		986	SAVETMPS;
		987
		988	PUSHMARK (SP);
		989	PUTBACK;
		990	call_sv (GvSV (coro_idle), G_DISCARD);
		991
		992	FREETMPS;
		993	LEAVE;
		994	}
		995	}
		996
		997	prev = SvRV (current);
		998	SvRV (current) = next;
		999
		1000	/* free this only after the transfer */
		1001	LOCK;
		1002	free_coro_mortal ();
		1003	UNLOCK;
		1004	coro_mortal = prev;
		1005
		1006	ta->prev = SvSTATE (prev);
		1007	ta->next = SvSTATE (next);
		1008	ta->flags = TRANSFER_SAVE_ALL;
		1009	}
		1010
		1011	static void
		1012	prepare_cede (struct transfer_args *ta)
		1013	{
		1014	LOCK;
		1015	coro_enq (SvREFCNT_inc (SvRV (GvSV (coro_current))));
		1016	UNLOCK;
		1017
		1018	prepare_schedule (ta);
		1019	}
		1020
		1021	static void
875	api_schedule (void)	1022	api_schedule (void)
876	{	1023	{
877	dTHX;	1024	dTHX;
		1025	struct transfer_args ta;
878		1026
879	SV *prev, *next;	1027	prepare_schedule (&ta);
880		1028	TRANSFER (ta);
881	LOCK;
882
883	prev = SvRV (GvSV (coro_current));
884	next = coro_deq (aTHX_ PRIO_MIN);
885
886	if (!next)
887	next = SvREFCNT_inc (SvRV (GvSV (coro_idle)));
888
889	/* free this only after the transfer */
890	coro_mortal = prev;
891	SV_CORO (prev, "Coro::schedule");
892
893	SvRV (GvSV (coro_current)) = next;
894
895	SV_CORO (next, "Coro::schedule");
896
897	UNLOCK;
898
899	transfer (aTHX_ SvSTATE (prev), SvSTATE (next),
900	TRANSFER_SAVE_ALL | TRANSFER_LAZY_STACK);
901	}	1029	}
902		1030
903	static void	1031	static void
904	api_cede (void)	1032	api_cede (void)
905	{	1033	{
906	dTHX;	1034	dTHX;
		1035	struct transfer_args ta;
907		1036
908	LOCK;	1037	prepare_cede (&ta);
909	coro_enq (aTHX_ SvREFCNT_inc (SvRV (GvSV (coro_current))));	1038	TRANSFER (ta);
910	UNLOCK;
911
912	api_schedule ();
913	}	1039	}
914		1040
915	MODULE = Coro::State PACKAGE = Coro::State	1041	MODULE = Coro::State PACKAGE = Coro::State
916		1042
917	PROTOTYPES: ENABLE	1043	PROTOTYPES: DISABLE
918		1044
919	BOOT:	1045	BOOT:
920	{ /* {} necessary for stoopid perl-5.6.x */	1046	{
921	#ifdef USE_ITHREADS	1047	#ifdef USE_ITHREADS
922	MUTEX_INIT (&coro_mutex);	1048	MUTEX_INIT (&coro_mutex);
923	#endif	1049	#endif
924	BOOT_PAGESIZE;	1050	BOOT_PAGESIZE;
925		1051
926	ucoro_state_sv = newSVpv (UCORO_STATE, sizeof(UCORO_STATE) - 1);
927	PERL_HASH(ucoro_state_hash, UCORO_STATE, sizeof(UCORO_STATE) - 1);
928	coro_state_stash = gv_stashpv ("Coro::State", TRUE);	1052	coro_state_stash = gv_stashpv ("Coro::State", TRUE);
929		1053
930	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));	1054	newCONSTSUB (coro_state_stash, "SAVE_DEFAV", newSViv (TRANSFER_SAVE_DEFAV));
931	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));	1055	newCONSTSUB (coro_state_stash, "SAVE_DEFSV", newSViv (TRANSFER_SAVE_DEFSV));
932	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));	1056	newCONSTSUB (coro_state_stash, "SAVE_ERRSV", newSViv (TRANSFER_SAVE_ERRSV));
933	newCONSTSUB (coro_state_stash, "SAVE_CCTXT", newSViv (TRANSFER_SAVE_CCTXT));
934		1057
935	main_mainstack = PL_mainstack;	1058	main_mainstack = PL_mainstack;
936		1059
937	coroapi.ver = CORO_API_VERSION;	1060	coroapi.ver = CORO_API_VERSION;
938	coroapi.transfer = api_transfer;	1061	coroapi.transfer = api_transfer;
939	}
940		1062
941	Coro::State	1063	assert (("PRIO_NORMAL must be 0", !PRIO_NORMAL));
942	_newprocess(args)	1064	}
943	SV * args	1065
944	PROTOTYPE: $	1066	SV *
		1067	new (char *klass, ...)
945	CODE:	1068	CODE:
946	Coro__State coro;	1069	{
		1070	struct coro *coro;
		1071	HV *hv;
		1072	int i;
947		1073
948	if (!SvROK (args) || SvTYPE (SvRV (args)) != SVt_PVAV)
949	croak ("Coro::State::_newprocess expects an arrayref");
950
951	Newz (0, coro, 1, struct coro);	1074	Newz (0, coro, 1, struct coro);
		1075	coro->args = newAV ();
952		1076
953	coro->args = (AV *)SvREFCNT_inc (SvRV (args));	1077	hv = newHV ();
954	/*coro->mainstack = 0; *//*actual work is done inside transfer */	1078	sv_magicext ((SV *)hv, 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro, 0)->mg_flags |= MGf_DUP;
955	/*coro->stack = 0;*/	1079	RETVAL = sv_bless (newRV_noinc ((SV *)hv), gv_stashpv (klass, 1));
956		1080
957	/* same as JMPENV_BOOTSTRAP */	1081	for (i = 1; i < items; i++)
958	/* we might be able to recycle start_env, but safe is safe */	1082	av_push (coro->args, newSVsv (ST (i)));
959	/*Zero(&coro->start_env, 1, JMPENV);*/	1083	}
960	coro->start_env.je_ret = -1;
961	coro->start_env.je_mustcatch = TRUE;
962
963	RETVAL = coro;
964	OUTPUT:	1084	OUTPUT:
965	RETVAL	1085	RETVAL
966		1086
967	void	1087	void
968	transfer(prev, next, flags)	1088	_set_stacklevel (...)
969	SV *prev	1089	ALIAS:
970	SV *next	1090	Coro::State::transfer = 1
971	int flags	1091	Coro::schedule = 2
972	PROTOTYPE: @	1092	Coro::cede = 3
		1093	Coro::Cont::yield = 4
973	CODE:	1094	CODE:
974	PUTBACK;	1095	{
975	SV_CORO (next, "Coro::transfer");	1096	struct transfer_args ta;
976	SV_CORO (prev, "Coro::transfer");	1097
977	transfer (aTHX_ SvSTATE (prev), SvSTATE (next), flags);	1098	switch (ix)
978	SPAGAIN;	1099	{
		1100	case 0:
		1101	ta.prev = (struct coro *)INT2PTR (coro_cctx *, SvIV (ST (0)));
		1102	ta.next = 0;
		1103	ta.flags = TRANSFER_SET_STACKLEVEL;
		1104	break;
		1105
		1106	case 1:
		1107	if (items != 3)
		1108	croak ("Coro::State::transfer(prev,next,flags) expects three arguments, not %d", items);
		1109
		1110	prepare_transfer (&ta, ST (0), ST (1), SvIV (ST (2)));
		1111	break;
		1112
		1113	case 2:
		1114	prepare_schedule (&ta);
		1115	break;
		1116
		1117	case 3:
		1118	prepare_cede (&ta);
		1119	break;
		1120
		1121	case 4:
		1122	{
		1123	SV *yieldstack;
		1124	SV *sv;
		1125	AV *defav = GvAV (PL_defgv);
		1126
		1127	yieldstack = *hv_fetch (
		1128	(HV *)SvRV (GvSV (coro_current)),
		1129	"yieldstack", sizeof ("yieldstack") - 1,
		1130	0
		1131	);
		1132
		1133	/* set up @_ -- ugly */
		1134	av_clear (defav);
		1135	av_fill (defav, items - 1);
		1136	while (items--)
		1137	av_store (defav, items, SvREFCNT_inc (ST(items)));
		1138
		1139	sv = av_pop ((AV *)SvRV (yieldstack));
		1140	ta.prev = SvSTATE (*av_fetch ((AV *)SvRV (sv), 0, 0));
		1141	ta.next = SvSTATE (*av_fetch ((AV *)SvRV (sv), 1, 0));
		1142	ta.flags = 0;
		1143	SvREFCNT_dec (sv);
		1144	}
		1145	break;
		1146
		1147	}
		1148
		1149	TRANSFER (ta);
		1150	}
979		1151
980	void	1152	void
981	DESTROY(coro)	1153	_clone_state_from (SV *dst, SV *src)
982	Coro::State coro	1154	CODE:
983	CODE:	1155	{
		1156	struct coro *coro_src = SvSTATE (src);
984		1157
985	if (coro->mainstack && coro->mainstack != main_mainstack)	1158	sv_unmagic (SvRV (dst), PERL_MAGIC_ext);
986	{
987	struct coro temp;
988		1159
989	PUTBACK;	1160	++coro_src->refcnt;
990	SAVE (aTHX_ (&temp), TRANSFER_SAVE_ALL);	1161	sv_magicext (SvRV (dst), 0, PERL_MAGIC_ext, &coro_state_vtbl, (char *)coro_src, 0)->mg_flags |= MGf_DUP;
991	LOAD (aTHX_ coro);	1162	}
992	SPAGAIN;
993
994	destroy_stacks (aTHX);
995
996	LOAD ((&temp)); /* this will get rid of defsv etc.. */
997	SPAGAIN;
998
999	coro->mainstack = 0;
1000	}
1001
1002	deallocate_stack (coro);
1003	SvREFCNT_dec (coro->args);
1004	Safefree (coro);
1005		1163
1006	void	1164	void
1007	_exit(code)	1165	_exit (code)
1008	int code	1166	int code
1009	PROTOTYPE: $	1167	PROTOTYPE: $
1010	CODE:	1168	CODE:
1011	_exit (code);	1169	_exit (code);
1012		1170
1013	MODULE = Coro::State PACKAGE = Coro::Cont	1171	int
		1172	cctx_count ()
		1173	CODE:
		1174	RETVAL = cctx_count;
		1175	OUTPUT:
		1176	RETVAL
1014		1177
1015	# this is slightly dirty (should expose a c-level api)	1178	int
1016		1179	cctx_idle ()
1017	void	1180	CODE:
1018	yield(...)	1181	RETVAL = cctx_idle;
1019	PROTOTYPE: @	1182	OUTPUT:
1020	CODE:	1183	RETVAL
1021	SV *yieldstack;
1022	SV *sv;
1023	AV *defav = GvAV (PL_defgv);
1024	struct coro *prev, *next;
1025
1026	yieldstack = *hv_fetch (
1027	(HV *)SvRV (GvSV (coro_current)),
1028	"yieldstack", sizeof ("yieldstack") - 1,
1029	0
1030	);
1031
1032	/* set up @_ -- ugly */
1033	av_clear (defav);
1034	av_fill (defav, items - 1);
1035	while (items--)
1036	av_store (defav, items, SvREFCNT_inc (ST(items)));
1037
1038	sv = av_pop ((AV *)SvRV (yieldstack));
1039	prev = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 0, 0))));
1040	next = INT2PTR (struct coro *, SvIV ((SV*)SvRV (*av_fetch ((AV *)SvRV (sv), 1, 0))));
1041	SvREFCNT_dec (sv);
1042
1043	transfer (aTHX_ prev, next, 0);
1044		1184
1045	MODULE = Coro::State PACKAGE = Coro	1185	MODULE = Coro::State PACKAGE = Coro
1046		1186
1047	# this is slightly dirty (should expose a c-level api)
1048
1049	BOOT:	1187	BOOT:
1050	{	1188	{
1051	int i;	1189	int i;
		1190
1052	HV *stash = gv_stashpv ("Coro", TRUE);	1191	coro_stash = gv_stashpv ("Coro", TRUE);
1053		1192
1054	newCONSTSUB (stash, "PRIO_MAX", newSViv (PRIO_MAX));	1193	newCONSTSUB (coro_stash, "PRIO_MAX", newSViv (PRIO_MAX));
1055	newCONSTSUB (stash, "PRIO_HIGH", newSViv (PRIO_HIGH));	1194	newCONSTSUB (coro_stash, "PRIO_HIGH", newSViv (PRIO_HIGH));
1056	newCONSTSUB (stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));	1195	newCONSTSUB (coro_stash, "PRIO_NORMAL", newSViv (PRIO_NORMAL));
1057	newCONSTSUB (stash, "PRIO_LOW", newSViv (PRIO_LOW));	1196	newCONSTSUB (coro_stash, "PRIO_LOW", newSViv (PRIO_LOW));
1058	newCONSTSUB (stash, "PRIO_IDLE", newSViv (PRIO_IDLE));	1197	newCONSTSUB (coro_stash, "PRIO_IDLE", newSViv (PRIO_IDLE));
1059	newCONSTSUB (stash, "PRIO_MIN", newSViv (PRIO_MIN));	1198	newCONSTSUB (coro_stash, "PRIO_MIN", newSViv (PRIO_MIN));
1060		1199
1061	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);	1200	coro_current = gv_fetchpv ("Coro::current", TRUE, SVt_PV);
1062	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);	1201	coro_idle = gv_fetchpv ("Coro::idle" , TRUE, SVt_PV);
1063		1202
1064	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )	1203	for (i = PRIO_MAX - PRIO_MIN + 1; i--; )
…		…
1072	coroapi.ready = api_ready;	1211	coroapi.ready = api_ready;
1073	coroapi.nready = &coro_nready;	1212	coroapi.nready = &coro_nready;
1074	coroapi.current = coro_current;	1213	coroapi.current = coro_current;
1075		1214
1076	GCoroAPI = &coroapi;	1215	GCoroAPI = &coroapi;
1077	sv_setiv(sv, (IV)&coroapi);	1216	sv_setiv (sv, (IV)&coroapi);
1078	SvREADONLY_on(sv);	1217	SvREADONLY_on (sv);
1079	}	1218	}
1080	}	1219	}
1081		1220
1082	#if !PERL_MICRO	1221	int
		1222	prio (Coro::State coro, int newprio = 0)
		1223	ALIAS:
		1224	nice = 1
		1225	CODE:
		1226	{
		1227	RETVAL = coro->prio;
		1228
		1229	if (items > 1)
		1230	{
		1231	if (ix)
		1232	newprio += coro->prio;
		1233
		1234	if (newprio < PRIO_MIN) newprio = PRIO_MIN;
		1235	if (newprio > PRIO_MAX) newprio = PRIO_MAX;
		1236
		1237	coro->prio = newprio;
		1238	}
		1239	}
1083		1240
1084	void	1241	void
1085	ready(self)	1242	ready (SV *self)
1086	SV * self
1087	PROTOTYPE: $	1243	PROTOTYPE: $
1088	CODE:	1244	CODE:
1089	api_ready (self);	1245	api_ready (self);
1090		1246
1091	#endif
1092
1093	int	1247	int
1094	nready(...)	1248	nready (...)
1095	PROTOTYPE:	1249	PROTOTYPE:
1096	CODE:	1250	CODE:
1097	RETVAL = coro_nready;	1251	RETVAL = coro_nready;
1098	OUTPUT:	1252	OUTPUT:
1099	RETVAL	1253	RETVAL
1100		1254
1101	void	1255	MODULE = Coro::State PACKAGE = Coro::AIO
1102	schedule(...)
1103	PROTOTYPE:
1104	CODE:
1105	api_schedule ();
1106		1256
1107	void
1108	cede(...)
1109	PROTOTYPE:
1110	CODE:
1111	api_cede ();
1112
1113	# and these are hacks
1114	SV *	1257	SV *
1115	_aio_get_state ()	1258	_get_state ()
1116	CODE:	1259	CODE:
1117	{	1260	{
1118	struct {	1261	struct {
1119	int errorno;	1262	int errorno;
1120	int laststype;	1263	int laststype;
…		…
1131	}	1274	}
1132	OUTPUT:	1275	OUTPUT:
1133	RETVAL	1276	RETVAL
1134		1277
1135	void	1278	void
1136	_aio_set_state (char *data_)	1279	_set_state (char *data_)
1137	PROTOTYPE: $	1280	PROTOTYPE: $
1138	CODE:	1281	CODE:
1139	{	1282	{
1140	struct {	1283	struct {
1141	int errorno;	1284	int errorno;

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